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a simple water problem? Not so.......

I need help with a mess my sprinkler system. We have a big yard, We have
about 8 sprinklers, on 4 circuits ea. They are a hodge podge. We've been fixing
problems for the last two weeks. One is a real problem.

We have 4 huge
canopy oaks. The sprinkler feedlines often run through oak roots. It's not at
all uncommon to have them puncture lines.

Started digging on one
bubble-up. Found a 1.5" OD thinwall pipe(?) <maybe hose> (?).

Now
your first question should be: what in the world is a 1.5" pipe doing feeding a
circuit. The answer is I have no idea in the world what it's doing there. But,
there it is.

I highly doubt no one is in your town know's what this stuff is. I mean homedept and lowes sells a similar type of this except it's 3/4". Poly pipe is used a lot

The pipe is either 80 psi or 100 psi polyethylene pipe in the form 1.5" ... It's probably a bit older so the quality is not as good as the pipe nowadays and the pipe is probably brittle.

If you have a big yard with 8 heads with only 4 zones. More then likely these heads require a lot of wire and the 1.5" is necessary .

As far as parts.. 2 barbed x barbed couplers with 8 hose clamps would do the trick with excavating a little more and bridge the pipe in... Or 2 barbed male adapters with a union and 4 hose clamps.. Or your telephone repair with 4 90's.
They don't sell these at your commericalized big store.. You need to find a local irrigation / plumbers store.. Such as Ewing, John deer landscapes ( and many more though i'm not sure what would be local in your area)

Problem is, I don't see any barbs of 1.5" sizes. Barbs would work. At least that would get me down to where I could use PVC.

Are there slick "L" fittings I can get for this? If I could find slick Ls, I could come out and up with a piece of pipe. I would also need to buy 2' or so of the pipe. A fix would be easy, if I can get slick Ls.

Is there cement which will work with this stuff?

I think you called it "poly pipe". None of the places anywhere in town carry it this big.

Can you tell the design of this zone? ( Ie doe the heads run out in a apparent to close straight line or are the heads all staggered around?

If you think the break is within the last 4 sprinkler heads then reducing the pipe you need to 1 1/4 or 1" should probably be fine, of course this is speculating cause I can't see it.

Where do you live???
I just purchased $150 in 1.5" brass barbed parts the other day at our local pipe store for a 200 psi 1.5" water service line. ( Granted they are a bad ass company that stocks every big product I need)